Pomdoctor (POM) shares were down 34% in premarket activity Thursday, nearly reversing the 36% rise in the prior session.

NVE (NVEC) stock was 23% lower, a day after the company reported lower fiscal Q2 net income and revenue.

Mercer International (MERC) shares were down 19% after Bloomberg News reported the company could file for Chapter 11 bankruptcy.

LiveOne (LVO) stock was 16% lower, reversing the 9.5% increase in Wednesday's session.

Cypherpunk Technologies (CYPH) shares were down more than 13% after a 19% rise in the prior close.